Keep this string in sync with gnome-control-center/capplets/display/xrandr-capplet.c:get_display_name()
Translators: this is the feature where what you see on your laptop's
* screen is the same as your external monitor. Here, "Mirror" is being
* used as an adjective, not as a verb. For example, the Spanish
* translation could be "Pantallas en Espejo", *not* "Espejar Pantallas".